Question

Factorise :-
${x}^{3} - 3x {}^{2} - 9x - 5$
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Answer 1

Answer:

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Factorise x3-3x2-9x-5. hence,

(x +1), (x -5) and (x +1) are the factors of given polynomial . ∴

By Factor Theorem, x - (- 1), i.e., (x + 1) is a factor of p(x). = (x + 1)(x - 5)(x + 1).

Step-by-step explanation:

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Answer 2

Answer:

x³-3x²−9x-5=x²(x+1)-4x(x+1)-5(x+1)

=(x+1)(x²-4x-5)

=(x+1)[x²-5x+x-5]

=(x+1)[x(x-5)+(x-5)]

=(x-1)(x-5)(x+1)

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